Question

A beam of light has a wavelength of 24.0 μm ( μm = 10 -6m). What is its frequency?


Choices:


a. 1.25 x 1013 Hz

b. 8.00 x 10-8 Hz

c. 1.25 x 107 Hz

d. 8.00 x 10-11 Hz

Answer 1

Answer:

Frequency = 1.25 ×10¹³ Hz

Explanation:

Given data:

Wavelength of light = 24.0  μm (2.4 ×10⁻⁵ m)

Frequency = ?

Solution:

Formula:

Speed of light = wavelength × frequency

Speed of light /wavelength = frequency

Frequency = 3×10⁸ m /s /2.4 ×10⁻⁵m

Frequency = 1.25 ×10¹³ s⁻¹

s⁻¹ = Hz

Frequency = 1.25 ×10¹³ Hz